U.S. adversaries realized they couldn't compete with the U.S. on spending. So they got creative and loaded the equivalent of Pringles cans up with a bunch of sensors, hooked them up to either a balloons or relatively cheap unmanned aircraft, and sent them through U.S. airspace to collect intelligence. They'd occasionally get caught (perhaps on purpose) and cause a base to scramble to intercept. The proposed theory on why they'd get caught on purpose was to gather up intelligence on what a response would be flying through the airspace.
It's possible they've been doing this for more than a decade and the military has gotten caught with egg on it's face having ignored the reports for so long.
The general premise is this:
U.S. adversaries realized they couldn't compete with the U.S. on spending. So they got creative and loaded the equivalent of Pringles cans up with a bunch of sensors, hooked them up to either a balloons or relatively cheap unmanned aircraft, and sent them through U.S. airspace to collect intelligence. They'd occasionally get caught (perhaps on purpose) and cause a base to scramble to intercept. The proposed theory on why they'd get caught on purpose was to gather up intelligence on what a response would be flying through the airspace.
It's possible they've been doing this for more than a decade and the military has gotten caught with egg on it's face having ignored the reports for so long.